Boat.



C. H. SAWYBR.

l BOAT. APPLICATION FILED APB.. 13,1910.

984,444. Y Patented Feb. 14, 1911.

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C. H. SAWYER.

BOAT.

APPLIUATION FILED APB. 13, 1910.

Patented Feb. 14, 1911.

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CHARLES H. SAWYER, OF MINNEAPOLIS, MINNESOTA.

BOAT.

Specification of Letters Patent.

lateuted Feb. 14, 1911.

Application 'filed April 153, 1910. Serial No. 555,187.

To alt whom it may concern.'

Be it known that I, Crmnnns It. Sawvnn, a citizen of the 'United States, residing at Minneapolis, in the county of Hennepin and State of i\/[i1niesota7 have invented certain new and useful Ii'nproveimmts in Boats; and I do hereby declare the following to be a full, clear, and exact description of the iuvention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to boats. and Vis designed as an rimprovement ou that type of boats disclosed and claimed in l'ietters latentof the United States No. till-0,2212, issued to me of date January 2nd 1900.

The objects of the present invention are to increase the etlieiency and use of manipulation of boats of the character above indicated, and to these ends, the invention consists of novel devices and combinationsl o1? devices hereinafter described and defined in the claims.

In the accompanyingdrawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a plan view of the improved boat` some parts being broken away: Fig. 2 is a longitudinal view of a boat embodying my invention; Fig. 3 is a longitudinal sectional view taken on the line trl .r1 of Fig. 1. showing typical details of the improved boat; and Fig. t a transverse sectional view taken on thi` line :v2-m2 of Fig. 1, showing a section through the cabin and the cylindrical portion ot the hull of the improved boat.

The numeral 1 indicates the hull of the boat which hull 1 is cylindrical and circula r in section except where it is tapered at the bow and stern. The rudder 2 is mounted at the stern in the usual or any suitable way. The cabin tl mounted above the hull 1 b v means of stringers '-1 and brackets 5. brackets 5 being rigidly secured to hull 1. The hatchway tl or portion of hull 1 extending vertically upward into cabin El provides access to cabin 3 from hull 1 by means of ladder T as best shown in Fig. 3. The hull 1 is constructed of circular sheet metal tubes rigidly secured end to end by means of channel-iron rings S, bent to a circular form with flanges out, as best shown in Figs. 1 and Said rings S serve to give rigidity to sheety metal f hull l.

The numeral 9 indicates rines with boxed racks il on the inner side, forming internal gears. The rings 9 are mounted within the channelsl of rings S by means of ball bearings 10. Said balls l() bear on the fillets of channels S and in the circular portion of rings S) as best shown in Fig. 3. and Fig. et. The ringsl t) are rigidly joined together in pairs by means of helical shaped paddles 1 1 as best shown in Fig. 2. i

'l`he numeral 12 indicates the guard .rails which are rigidly secured to lmll 1 b v means of brackets 12 and by ilanged ends 12".

'lhe numeral lil indicates the hand rail extending around the deck of the boat.

The numeral Il indicates the hatches at the bo and stern of the hull.

The numeral 15 indicates the double c vlinder. reversible. center cranked. engines rigidly secured to the bottom of hull 1. i

Ihe numeral '1o indicates the crank shafts mounted on engines 15. (ln each end of crank shafts v16 are mounted pinions or external gears 17 which project' through open ings in the webs o tz ehauuelwiron rings S and set in mesh with internal gears or racks 9 as best shown in Fig. il. The openings in the webs of channel-iron rings S as well as pinious or external gears 1T are iuclosed by water tight housings S rigidly secured to ehannel'irou rings tl; the crank shafts 16 being admitted into housings S by means of vater tight stulling boxes 1S.

Referring to Fig. Q. there are shown five sets of helical shaped paddles 11` axially alined longitudinally of the boat. The first set ot paddles` 11 causes a forward movement. of the boat relative to the water b v revolving toward the right or by revolving in a direction sueh that the paddles 11 belonging to the first set appear to move downward ou the side shown in Fig. Q. The second set of paddles 11 gives the boat a forward movement by revolving toward the left. The third set. gives the boat forward movement by a right hand revolution whereas the fourth set must turn to the left and the fifth to the right to produce the same movement.

'Ihe forward movement of the boat. as above described may be arrested by a reversal of the directions of `revolution of the several sets of paddles 11 namely the first set to revolve to the left; the second to the right: the third to the left; the fourth to lthe right; and the fifth to the left. The backward movement of the boat is e'llected by revolving the various sets of paddles 11 in directions opposite to those required for a forward movement of the boat. W hen the boat is moving either forward or backward the first, third and .fifth sets of paddles ll are revolving in one direction and the second and fourth sets of paddles ll are revolving in the opposite direction. nhe areas of the first, third and fifth sets of paddles ll equal the areas of the second and fourth sets of paddles ll as best shown in Fig. l-lence when the boat is made to move either forward or backward, the side draft which the first, third and fifth sets of paddles ll tend toproduce is connterbalanced by the side draft which the second and fourth sets of paddles ll tend to produce, thus reducing the resultant side draft to Zero and allowing the boat to move directly forward or backward on its course without any lateral movement.

fThe operation of my improved boat is as follows: The engines l5 having been started; the crank shafts 1G cause the pinions or external gears 1T to revolve and these in turn mesh into and revolve the internal gears 9 or the rings 9. vThen each pair of rings 9 is revolved the set of helical paddles rigidly secured thereon is forced through the water thus imparting motion to the boat.

Obviously in many respects the details of my invention may be modified, and do not therefore desire to confine myself to the construction herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. rfhe combination with a tubular boat hull, of propellers having rings rotatively mounted on said hull and provided with right and left spiral propeller blades, and means for rotating the right spiral propellers in one direction and the leftspiral propellers in the opposite direction, substantially as described.

2. ik boat, comprising a hull substantially circular in cross-section having near the central part an upright extension through which access may be had to the interior of said hull, brackets extending upward from said hull, a deck supported upon said eXtensions and extending over said hull, a series of rings encircling said hull, helical paddles mounted on pairs of said rings, and means for revolving said rings and said helical paddles, substantially described.

ln a boat .having a cylindrical hull, channels encircling said hull, openings in the webs of said channels, pinions mounted ou a shaft` said pinions projecting through said openings and engaging interi'ial gears n'munted within said channels, said pinions and said openings covered by water tight housings, said shaft entering said housings through watertight stuffing boxes, substantially as described.

in witness whereof I have hereunto setmy hand this 9th day of April, 1910,

CHARLES H. SAVYER.

In presence of-- R. B. HosTn'rLnR, lVnsLEr BAKKER. 

